Gin-saw gummer



' (No Model.)

J. W. SMITH.

- GINVSAW GUMMER.

No. 475,621. Patented May 24, 1892.-

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UNITED STATES PATENT- FFICE.

JEREMIAH \V. SMITH, OF ATHENS, GEORGIA.

GIN-SAW GUMIVIER.

SPECIFICATION forming part of Letters Patent No. 475,621, dated May 24,1892.

Application filed November 17, 1891. $erial No. 412,238. (No model.)

To all whom it may concern:

Be it known that I, JEREMIAH SMITH, of Athens, in the county of Clarkeand State of Georgia, have invented certain new and useful Improvementsin Gin-Saw Gummers; and I do hereby declare the following to be a full,clear, and exact description of the invention, such as will enableothers skilled in the art to which it appertains to make and use thesame, reference being had to the accompanying drawings, and to figuresof reference marked thereon, which form a part of this specification.

This invention relates to devices for shaping gin-saw teeth by cuttingout the metal at the bottom and sides of the interdental spaces, toperform which operation the utmost delicacy is necessary, as the leastdeviation of the tooth from the proper angle causes it to cut or nap thecotton in drawing it through the gin-grid. To produce a machine,therefore, of this class possessing these qualities is the object ofthis invention, the detail of which will be hereinafter fully specified.

In the accompanying drawings, Figure 1 is a side elevation of thedevice, showing same in position on a saw. Fig. 2 is a plan of themachine, as shown in Fig. 1. Fig. 3 is a view of the cam-box and punchand die levers, looking from the front of the machine. Fig. 4 is a sideview of aportion of the punch and the die and the die-carrying lever.Fig. 5 is a plan of the forward portions of the punch and die levers.

In the views like reference-marks indicate corresponding elements ofconstruction.

1 is the saw, 2 the space-blocks, and 3 the shaft thereof.

4 is the frame of the gummer, the forward end of which is bifurcated toextend above and below the space-blocks, as shown in Fig. 1, and has acorrelatively-bifurcated part 5 screwed to its side, a space beingleftbetween said parts 4 and 5 to allow the same to pass over a saw andhold the machine stationary thereon. A handle 6 is conveniently placedat the back, and a spur 7 may be employed, if

desired, to engage a saw-horse or bench set-in front of thesaw-cylinder.

On the upper side of the frame 4 is a table 8, which has its edgesbeveled, and on this table a bed-frame 9 is arranged, movable backwardand forward, being adjustable transversely of said table by screws 10and 11,and passing through the downwardly-projecting flanges 12 thereon.By loosening the screw 11 it is obvious that the bed 9 may be movedforward or backward and its lateral position relative to the table 8 bepreserved, the tightening of said screw holding it in position to whichit is moved. The flanges 12 are projected beyond the bed 9 in front andform bearings for the rock-shaft 13, which has thereon a short arm 14:,carrying a pitman 15, on the distal extremity of which is a blade 16, soarranged thereonthat it will engage with the teeth of the saw. A longarm 17 is also a secured to the rock-shaft 13, extending backwardtherefrom and having connected to its free end or at the desireddistance from the rock-shaft 13 the pitman 18, Which carries 011 itsupper end a strap 19, surrounding an cecentric 20 on the shaft 21,suitably journaled in the lugs 22 of the bed 23. For the necessary partof its length the lever 17 is curved, the curvature being such as willpreserve the proper relative positions of the eccentric and said leverwhen the pitman is connected at any one of the holes in the lever.

The bed 23 is pivoted near its middle portion to the lugs 24 on the bed9 and has motion on said pivot to raise either end and lower theopposite end, which adjustment is rendered necessary by the differencein angle of the teeth in different makes of saws and the difference inthe diameter of saws. This adjustment is effected by means of the screws25 and 26, passing downwardly through the bed 23 and bearing against thetop side of the bed 9.

Pivoted by pins 27 to the bed 23, as shown in Fig. 2, are the punch anddie levers 28 and 29, respectively. These levers 28 and 29 preferablyhave bearing against each other between their pivotal points, whichtakes all operating strain from the pins 27. Carried in the end of thelever 28 is a punch 30, the same being heldthereiu in any desired way,preferably a dovetail and set-screws or wedge. This punch may obviouslybe of any shaped face desired, and the die 31, carried in the arm 29. inthe same manner as the punch is held in its lever, should conformthereto. The notch 32 in the lever forms a clearance for the die.Obviously the punch and die should be reciprocated to and from eachother, the motion forward being necessarily forcible. To obtain thismotion, an incline 33 is made on the outside of each lever 28 and 29. Ashaft 34, housed in a rectangular frame 35, passes through the levers 28and 29 and carries outside of said levers two wipers 36, which pass intheir downward movement over in the inclines 33, said movement beingcaused by the eccentric 37 on the shaft 21 through the pitman 38 andlever 39 on the shaft 34L.

The levers 28 and 29 are held normally apart by a spring 40 of requisiteform and tension. The movement of the levers 28 and 29 is limited by theset-screws 41, passing through the flanges 42 of the bed 23.

A hand-crank 44 is secured to the shaft 21, whereby power is appliedthereto.

The-operation of the driver is as follows: The bifurcated end of theformer is placed over the saws and space-blocks, as shown and described,and the bed 23 moved up or down until the punch is directly over theproposed out, after which the feed is set to catch each successive toothand turn the saw an equivalent distance. .The hand-crank is then turnedand the feed-lever caused to vibrate and the wiper-shaft caused topartially revolve, which 1 feeds the teeth under the punch in successiveorder and then closes the punch and die on 1 them. As soon as one sawhas been fully completed, the operation, barring all adj ust-ment, isperformed on the next saw, and so on.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent of the United States, is-

1. In a device of the class specified,aframe bifurcated and slitted inthe forward end to fit over the space-blocks and saws, a bed slidingthereon,movable to and from the saws, a second bed pivoted near itsmiddle portion to said sliding bed, so that each end has verticalmovement, and two arms pivoted thereon and movable laterally andcarrying, respectively, a punch and correlative die, for the purposespecified.

2. In a device of the class specified, a frame adapted to be applied toa saw-mandrel, correlatively-vibratable levers pivoted thereon, normallyheld apart and carrying dies in their ends and having inclined lugsthereon, a housing inclosing said levers, a shaft passing through saidhousing and levers and carrying wipers in contact with said inclines,and means for causing an oscillation of said wipers, for the purposespecified.

In testimony whereof I hereunto affix my signature in presence of twowitnesses.

JEREMIAH W. SMITI-I. Witnesses:

J. M. WEATHERLY, T. P. VINCENT.

